Container images with UBI micro

Investigate the feasibility to provide UBI micro based Liberty images

We'll need UBI micro based Java images first. This issue is opened with Java team: https://github.com/ibmruntimes/Semeru-Runtimes/issues/8

References:

• UBI micro images:
  "The ubi-micro is the smallest possible UBI image, obtained by excluding a package manager and all of its dependencies which are normally included in a container image. This minimizes the attack surface of container images based on the ubi-micro image and is suitable for minimal applications, even if you use UBI Standard, Minimal, or Init for other applications. The container image without the Linux distribution packaging is called a Distroless container image."

• Using the UBI micro images: https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/9/html-single/building_running_and_managing_containers/index#proc_using-the-ubi-micro-images_assembly_adding-software-to-a-ubi-container

Poll:
Users, is this something that would be beneficial to you and will be used for your applications? Add a 👍 or 👎

Read the linked Semeru-Runtimes issue and Red Hat's UBI micro documentation first. Then assess whether the required Java images are available and whether Liberty images can be based on them; done means recording a feasibility decision and the resulting image scope, since this issue names no repository files or tests.